Apparatus for plastering columns or the like.



No. 65l,957= I Patented luhe I9, i900.

v J. R. TOBIN. APPARATUS FOR PLA-STERING COLUMNS 06 THE LIKE.

(Application filed Mar. 6, 1900.)

(No Model.)

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NrTE j STATES PATENT OFFICE.

cent to the shaft.

JOHN R. TOBIN, or SAN FRANCISCO, CALIFORNIA.

APPARATUS FOR PLASTERING COLUMNS OR THE LIKE.

SPECIFICATION formingpart of Letters Patent No. 651,957, dated June 19,1900.

' Application filed March 6, 1900' Serial No. 7,478. (No model.)

To all whom it may concern.-

Be it known'that I, JOHN R. TOBIN, a citizen of theUnited States,residing in the city and county of San Francisco, State of California,have invented an Improvement in Ap paratus for Plastering Columns or theLike; and I hereby declare the following to be a full, clear, and exactdescription of the same.

My invention relates to a device which is designed for use in plasteringcolumns, pilasters, and similar surfaces for the purpose of making theplastered surface of an even thickness and to maintain an equal diameterand outline of the cylinder or other column after it has been finished.

It consists of a bar of proper length having the edge formed to producethe desired form of the column and rings adapted to be fitted to the topand bottom, forming supports for the ends of the bar, so that when thelatter is moved over the plastered surface its edge will level or evenofi the surface, so that the whole circumference of the column or thesegment to which it is applied will be of even thickness and symmetricalform.

My invention also comprises details of construction, which will be morefully explained by reference to the accompanying drawings, in which-Figure l is a view of-the column, showing the application of myinvention. Fig. 2 is an elevation showing the rings as applied to acolumn. Fig. 3 is a view of the bar. Fig. 4 shows a finished polygonalcolumn.

Great difiiculty is experienced in plastering columns and like surfacesto maintain an even distribution of the coating material and to give asymmetrical form to the column or segment of the column when the plasteror like coating has been applied.

It is the object of my invention to make an even and regular surfaceupon the column or any segment thereof which may be exposed and to makeall of a series of such columns or surfaces absolutely equal in size andsymmetrical in form.

A represents rings having a diameter which will allow them to fit thecircumference of the column at the top and bottom of the shaft andadjacent to the fillets, astragal, or other parts of the capital andbase which are adja- These rings are preferably made in halves pivotedtogether at one side,

as shown at 2, and this allows them to be opened to be placed upon thecolumns. The opposite ends are then brought together and held by a pinor equivalent locking device.

3 isa bar of any suitable material and description. It may be made oflight metal or of wood, and the edge maybe coated or protected by sheetmetal, if preferred. The edge of the bar which is designed to form andshape the column is made to correspond with the shape of the column,which may be straight, or it may be slightly curved, as in some cases,in which case the edge of the bar would be made concaved, asillustrated.This bar is long enough to extend between the fillets at top and bottomof the column, and the rings A being fixed just beneath the upper andabove the lower fillet the ends of the bar will rest upon these rings.After the first rough coat of plaster has been placed upon the columnthis. bar may be applied and moved around the column, thus smoothing andevening the surface, leaving it. perfectly circular at any point ofhorizontal section.

If the column be made polygonal, the rings A will be made of a shapecorresponding, and the bar being moved over the rings, following theirshape, will form each of the surfaces of the column in even planes fromtop to bottom.

In some cases it may be desired to form grooves or beads upon thesurfaces. This will be effected by making corresponding projections orgrooves in the bar 3, as shown at hand the plaster or coating materialwill be shaped by this groove or projection so as to leave acorrespondiugly-reversed shape upon the column. After the main body ofthe col- 9o umn has been thus shaped the rings A are removed bydisengaging them, opening them about their hinged points. When thusremoved, the small space occupied by the rings at the top and bottom caneasily be filled and g5 made even and regular with'relation to thesurface already completed, this space being so small that there will beno difficulty in thus leveling it up.

It will be understood that any portion of a no complete column, as thesegment of a-cylin- I der, can be inlike manner completed and fin- Iished up, and the work can be very rapidly and accurately done, two menbeing able to complete seven or eight times as much work with thisapparatus as can otherwise be done. Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-- In animproved apparatus for producing symmetrical surfaces -upon plastered orcoat- 7 ed columns, and 'in combination with a bar acting as a surfacerfor the, body of the column, the removableand replaceable guiderings forthe upper and lower ends of the bar said rings forming a gage for theplaster and each formed of a plurality of segments hinged together atone end whereby they may be opened and closed to detachably fit thecol-15 umn, and means for detach'ably uniting the free endsof the segments.

h In witness whereof I have hereunto set my and.

JOHN R. TOBIN.

Witnesses: I

S. H. NOURSE,

JESSIE C. B RODIE.

